[plt-scheme] Web server examples

I wrote:
> Someone on c.l.s. also pointed out that the "New Quiz" button on the 
> last page of the example quiz doesn't work.  Pressing the button goes to 
> a URL like:
> 
> http://foo.com/servlets;id23*0/examples/quiz.ss?
> 
> ...which results in a file not found error.  The same URL without the 
> continuation ID works fine.

Oops, it looks as though this may just be the result of an aggressive 
session timeout, i.e. an expired continuation, so is probably not a bug 
in the quiz per se.

Anton